Patent application number | Description | Published |
20080297066 | Illumination Device and Method for Controlling an Illumination Device - The present invention relates to a method for controlling an illumination device ( | 12-04-2008 |
20090160364 | OPERATING SOLID-STATE LIGHTING ELEMENTS - Operating a lighting device by acquiring a target brightness level of at least one solid-state lighting unit, and determining a reference driving current amplitude for obtaining the target brightness level. If the reference driving current amplitude is below an optimum driving current amplitude, the solid-state lighting unit is operated at the optimum driving current amplitude, which is pulse-width modulated to obtain the target brightness level. | 06-25-2009 |
20090230875 | METHOD AND A DRIVER CIRCUIT FOR LED OPERATION - In a method and a driver circuit for operating one or more light emitting diodes, LEDs, an alternating supply current is generated and transformed to an alternating secondary winding voltage. Using rectifier means, such as diodes or synchronous switches, the alternating secondary winding voltage is converted to a substantially constant load current by using a buffer element, such as an output choke, i.e. a suitable inductor. The power transferred from the power source to the LEDs may be controlled by frequency control of the alternating supply current. | 09-17-2009 |
20100045188 | ADJUSTING A DRIVING SIGNAL FOR SOLID-STATE LIGHTING DEVICES - Adjusting a driving signal for a lighting device by obtaining a temperature of the lighting device, and adjusting at least one parameter of a conversion procedure depending on the obtained temperature. Further a set-point of a desired colour and/or brightness is converted into a set-point of colour sensor coordinates with the conversion procedure. The actual colour values of the lighting device are obtained, and the driving signal is adjusted based on a difference between the colour sensor coordinates set-point and the obtained colour values. | 02-25-2010 |
20100045478 | INTRINSIC FLUX SENSING - According to an exemplary embodiment of the present invention, a lighting system for communication with a remote control device is provided, which comprises a light emitting element adapted for emitting modulated light to the remote control and for detecting control signals from the remote control. This may provide for a communication between the remote control and the lighting system without the need of an extra sensor or an extra transmitter. | 02-25-2010 |
20100164387 | SUPERVISION OF AN ILLUMINATION DEVICE - The invention relates to an illumination device ( | 07-01-2010 |
20100232571 | DUAL-COLOUR PYROMETRIC MEASUREMENT OF X-RAY FOCAL SPOT TEMPERATURE - An x-ray tube disclosed here in includes an emitter arranged to emit electrons on to a focal spot on a rotatable anode. The x-ray tube also includes a hollow tube arranged to receive electromagnetic radiation from the focal spot at one end of the hollow tube and transmit it to another end. The x-ray tube also includes two or more sensors arranged to detect the electromagnetic radiation through the hollow tube. | 09-16-2010 |
20110057571 | DEVICE AND METHOD FOR CONTROLLING THE COLOR POINT OF AN LED LIGHT SOURCE - The present invention relates to a device and method for controlling the color point of an LED light source ( | 03-10-2011 |
20110140131 | PHOTO-DETECTOR WITH WAVELENGTH CONVERTER - The invention relates to a photo-detector comprising a light sensitive element ( | 06-16-2011 |
20110188536 | DUAL-COLOR PYROMETRIC MEASUREMENT OF X-RAY FOCAL SPOT TEMPERATURE - An x-ray tube disclosed here in includes an emitter arranged to emit electrons on to a focal spot on a rotatable anode. The x-ray tube also includes a hollow tube arranged to receive electromagnetic radiation from the focal spot at one end of the hollow tube and transmit it to another end. The x-ray tube also includes two or more sensors arranged to detect the electromagnetic radiation through the hollow tube. | 08-04-2011 |
20120056545 | CIRCUIT FOR AND A METHOD OF SENSING A PROPERTY OF LIGHT - In a circuit ( | 03-08-2012 |